Bobbin-stripping machine



5 SHEETS'SHEET I G. K. HANNAH ET AL BOBBIN STRIPPING MACHINE. FILED JUNE 29. 1921 Dec. 19 1922 Dec. 19 1922.

G. -K. HANNAH ET AL.

5 SHEETSiSHEET 2 FILED JUNE 29. I921 Dec. 19' 1922.

- G. K, HANNAH ET AL. Boasm STRIPPING MACHINE. FILED JUNE 29. I921 5 SHEETSSHEET 3 Dec. 19 1922. 1,439,162 s. K. HANNAH ET AL.

Boas I N STR PP NG MACHINE F 1 LED JUNE 29 I 921 5 SHEETS'SHEET 5 r Patented Dec. l9, i922.

siren per.

enonen K. HANNAH, snivrunn M. .rrn'ron. AND ivmrrr AARLELA, or erroneou MASSACHUSETTS. i j

BOBBIN-STRIPPING MACHINE.

Application ra a .Tune '29, 1921. Serial No. 481,424.

at Fitchburg, in the county of Worcester and State of Massachusetts, have invented a new and useful Bobbin-Stripping Machine, or" which the. followingiis a specification.

This invention relates to a machine for removing waste yarn from bobbins which have been ejected by the weft replenishing mechanism of an automatic loom. It is common to provide weft detecting mechanism by which the weft replenishing mech anism is called into operation just before the filling upon the active weft carrier is exhausted. The weft carriers or bobbins are thus ejected with a small amount of waste yarn thereon and it isnecessary to remove this yarn before the bobbins can be again used. M i

The removal of the yarn by hand is. eX- pensive and otherwise unsatisfactory; as the yarn clings tightly to thebobbin andcan hardly be removed manually except by cutting, which almost invariably injures :the bobbin.

Machines have been heretofore designed for removing the yarn from the; bobbin by stripping the yarn lengthwise therefrom and it is the general object otourinvention to provide an improved machine for thispurpose, so designed that it will be efiicient and reliable in operation and that it willrrt quire very littleattention from the operator. With this general object.v in view our invention relates particularly tocert-ain arrangements and combinations of parts to be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of our invention {is shown in the drawings in which Fig. l is a side elevation otour improved machine; 1

Fig. 2 is a detail plan view of aportion of the hopper or magazine, looking in the direction'oi the arrow 2 in Fig.;-1; Fig. 3 is a left'hand end elevation of the machine, taken in the direction of the arrow 3inFig.1;

Fig. 4 is a perspective'view of one of the weights used in connection with the movable stripping aws;

Fig. 5 is an enlarged partial front elevation, looking inthedirecti-on of the arrow 5 in Fig. 3;

Fig. 6 is an end elevation of the waste ejector;

.Fig. 7 is a front view thereof: looking in the direction of the arrow 7 in Fig. 6;

Fig. 8, is a plan view of the bobbin stripping mechanism; i

Fig. 9 is. asectlonal end elevation, taken along the. line 9-9'in Fig. 8;

Figs. 10,. 11 and 12 are diagrammatic vlegvs showing the operation of the machine, an i Fig-13 is a diagrammatic view indicating theoperation of the waste ejector.

Referring to the drawings, our improved machlne comprises a. base 20 supported on legs 21.- A magazine ory hopper 22. is mounted above the base 20, said magazine being preferably formed-as a curved segment and being inclined to feed the bobbins by gravity toward thestripping devices. it

its lower or front end, the magazine or. hop per 22 communicates with. guide plates forming avertical passage 23 (Figs, 3 and i 9) through which the bobbins move down ward until the lowermost bobbin restsupon a series of supports 24, 25 and 26 (Figs 8 and I j r The supports 24: and 25 are pivotally connected to the lower ends of two-armed levers 27, and QSliXed to a cross shaft29 supported in hearings in a frame 30 secured to.

the base 20. The support 2(l is pivotally con nected to an ar1n31 (Fig. 3) also secured to the shaft 29 and connected by afilink 32.

to a lever 33 pivotally mounted on the end.

of the frame 30.

Alink 3 L connects the, lower arm of the lever 33 to' the arm 35 ofa bell crank 36 which is pivoted at; 37 on the base 20. A

, of the leversQT .and'28 and are in inoperastop 38 limits rearward movement of the it (Fig. 3) secured to the end of the frame 30,

F50 9 will show "that a Reference to l clock-wise rocking movement of the shaft 29 will withdraw the supports and advance the rods, thus permitting the escape of a single bobbin from the magazine Such rocking movement of the shaft 29is caused by engagementofaro'll 4A with the lower, end of the bell crank 36. The roll a l is mounted on the end of a widefaced cam fixed to a cam shaft 46 (Fig. 1) supported in bearings s7 extending downward from the base 20. The shaft 46 may be rotated in any convenient manner, as by a motor i8 positioned below the base 20 and connected by a belt 49 to a pulley 50 on a shaft A pinion 52 on the shaft 5l-enga gesa gear 53 on a shaft 54, which shaft is connected by beveled gears 55 and 56 to the cam shaft 4-6.

As the bobbin is released from the supports 24, 25 and 26 it falls upon a *plu rality "of fixed hook-shaped stripping jaws 60, 61 and '62 (Figs. '8 and 9). Movable jaws 63, 64 and 65 are mounted upon separate pivots 66, 67'and 68 on the frame-30 and are connected by links 69 (Fig. 9') to separate cam-operated levers 70. r i

The levers 70 are loosely mounted upon a cross shaft/71 in the frame 30 and the L- shaped lower ends of the levers extend over the cam 45 in position for engagement therewith. "Heavy weights 72 Y are mounted on the lower "ends of the levers 70 and springs 73 connect two of the levers 70 to tension levers 74L. pivoted at 75 011 the leg 21 and engaging the lower face of-the cam 45. No spring 73 is used in connection with the lever 70 which actuates the movable jaw 65 as this jaw engages thetip of the bobbin where slight pressure is required.

A yielding endstop or guide 76 (Figs. 1 and 3) is pivoted at 77 on the end plate of the passage 23. A light spring 78 1holds the guide 76 'yieldingly in the position shown in Fig. 1, in which position it =locates the bobbin correctly for 'th'eoperation of the stripping jaws. As 'the'bobbin" is thereafter ejected from the stripping mechanism, the guide 76 yields to permit the'exit of the bobbin. V

Y The mechanism thus far described provides for feeding the bobbins automatically and intermittently to the stripping jaws. After a bobbin is positioned and securely held between the jaws it is forced endwise from the machine while the jaws at the same time strip the waste therefrom. This-ends movable jaws 63, 64 and 65 to wise ejection of the bobbin is caused by a plunger 80 (Fig. 1) slidable in bearings 81 mounted on the base 20 and connected at one end to a cross head 82 mounted to slide in guides 88. The cross head 82 is connected by a link 8& to a crank arm 85 on a shaft 86. A gear 87 on the shaft 86 meshes with the gear 53 in the gear train which drives the cam shaft 4 6. I

The plunger 80 is preferably provided. .with a smallprojection 88 (Fig. 5) which enters the tip of the bobbin and prevents relative lateral displacement of the bobbin and plunger. A guide piate 89 1) is secured to the end of the base 20 and vancing the rods40 and 41 to hold back.

the next bobbin. At the time when the bobbin is thus placed on the fixed jaws, the levers 70 are held in raised position by the cam l5, thus raising and withdrawing the permit the insertion of the bobbin.

The levers 70 are then permitted to move downward under the influence of the weights 72 and springs 73, which place a heavy but yielding pressure upon 'the movable jaws. The plunger 80 thereupon advances, forcing the bobbin endwise from between the jaws. During this operation the jaws grip whatever waste there may be on the bobbin and prevent movement of the waste with the ejected bobbin. Under ordinary conditions the stripping operation is performed almost entirely'by the pair of j aws 60 and 63 adjacent the butt of the bobbin but'with certaintypes of bobbins the Waste may extend nearly the entire length of the bobbin.-

It is found that the waste thus stripped from the bobbins is liable to clog the machine during the continued operation there of and accordingly we have made special provision for ejecting the waste. "'Forthis purpose we have provided the ejector shown in Figs. 5, 6 and 7 which ejector comprises a U-shaped frame 90 mounted on fixed pivots: 91 igr 5) having short' upwardly projecting fingers=92 (Fig. 7). The frame 90 is connected link 93"to abell crank 94 (Fig. 9) to which isconnected a spring 95 which yieldingly holds the waste ejector in the position shown in full lines in Fig. 6. A cam roll 96-.is mounted on one end of the cam 4-5 (Fig. 5) in position to engage the bell crank 94: and swing the waste ejec- "tor 90 to the position shown in dotted lines in Fig. 6 immediately after the ejection of each bobbin. Such movement of the ejector clears the waste from the fixed jaws, as indicated in Fig. 13 and deposits the waste in a separate receptacle 97 (Figs. 1 and 8).

The machine thus described has been found in practical operation to show marked advantages for the purposes deslgned and in the art within the spirit and scope thereof as set forth in the claims and we do not wish to be otherwise limited to the details herein disclosed but what we do claim is 1. In a bobbin stripping machine having bobbin feeding mechanism, in combination, a plurality of fixed supporting jaws, a plurality of movable jaws co -operating therewith to support a bobbin and guide the same axially, and means to force an operatively positioned bobbin longitudinally from between said jaws.

2. In a bobbin stripping machine having bobbin feeding mechanism, in combination, a plurality of fixed supporting jaws, a plurality of movable jaws co-operating therewith to support a bobbin and guide the same axially, means to positively remove said movable jaws from operative position, means to yieldingly return said jaws to operative position, and means to force an operatively positioned bobbin longitudinally from between said jaws.

3. Ina bobbin stripping machine having, a plurality of fixed supporting 'aws, a pluable jaw toward rality of movable jaws (Jo-operating there with to support a bobbin and guide the same axially in position, a hopper having a gravity it'eed toward said jaws, rality oi? bobbin supports, a plurality of bobbin retainers, and means for simultaneously moving said supports and retainers alternately to operative and inoperative positions, thereby presenting said bobbins singly to said jaws.

4. In a bobbin stripping machine, a plurality of fixed stripping jaws, a plurality of movable stripping jaws, and independent means for yieldingly advancing each movits associated fixed to grip bobbin. between said jaws.

5. In a bobbin stripping machine, jaws to support and grip a bobbin, means to eject a bobbin longitudinally therefrom, and mechanical means to positively remove the waste yarn from the jaws after the bobbin has been ejected therefrom.

6. In a bobbin stripping machine, jaws to support and grip a bobbin, means to eject a bobbin longitudinally therefrom, and a transversely swinging frame effective to remove the waste yarn from said jaws.

7 In a bobbin stripping machine, a plurality of fixed jaws having recessed outer ends, a plurality of movable jaws co -operatmg therewith and having hook-shaped outer ends, and 'means to yieldingly ada pluvance said movable jaws to engage a bobbin supported on said fixed jaws.

8. In a bobbin stripping machine having bobbin stripping means, a'segmental inclined hopper effective to feed bobbins to said stripping means and means to release bobbins singly from said hopper.

In testimony whereof we have hereunto aiiixed our signatures.

GEORGE K. HANNAH. S-AhTUEIJ M. TILTON. MATTI KAARLELA. 

